Honestly, imo, Reach had the best map/gametype voting system. It was, usually, 3 different map/gametype combos & then "None of the Above" to give players a choice between 3 more. Plus the fact that you could change your vote if you wanted to pick something else. I would rather deal with map/gametype jugglers(holding down & pressing A repeatedly) than be stuck with whatever I pick 1st out of habit. Especially when I'm in a party & I or someone else picks what they usually do when playing solo & then the group decides to play another option.
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